Flow-induced structures versus flow instabilities

The Taylor-Couette flow of a dilute micellar system known to generate shear-induced structures is investigated through simultaneous rheometry and ultrasonic imaging. We show that flow instabilities must be taken into account since both Reynolds and Weissenberg numbers may be large. Before nucleation...

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Published inPhysical review. E, Statistical, nonlinear, and soft matter physics Vol. 89; no. 1; p. 011001
Main Authors Fardin, M A, Perge, C, Taberlet, N, Manneville, S
Format Journal Article
LanguageEnglish
Published United States 02.01.2014
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Summary:The Taylor-Couette flow of a dilute micellar system known to generate shear-induced structures is investigated through simultaneous rheometry and ultrasonic imaging. We show that flow instabilities must be taken into account since both Reynolds and Weissenberg numbers may be large. Before nucleation of shear-induced structures, the flow can be inertially unstable, but once shear-induced structures are nucleated, the kinematics of the flow become chaotic, in a pattern reminiscent of the elastically dominated turbulence known in dilute polymer solutions. We outline a general framework for the interplay between flow instabilities and flow-induced structures.
ISSN:1550-2376
DOI:10.1103/physreve.89.011001